Sökning: "planetary systems"

Visar resultat 1 - 5 av 46 avhandlingar innehållade orden planetary systems.

  1. 1. The Indivisible 2030 Agenda : Systems analysis for sustainability

    Författare :David Collste; Sarah E. Cornell; Arnaud Diemer; Thomas Hahn; Ana Paula Dutra Aguiar; Jan Sendzimir; Stockholms universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; 2030 Agenda; Sustainable Development Goals; SDGs; synergy; integrated policy; systemism; planetary boundaries; policy coherence; system dynamics; participatory approach; human well-being; Sustainability Science; vetenskap om hållbar utveckling;

    Sammanfattning : In 2015 the United Nations adopted the 2030 Agenda with 17 global sustainable development goals (SDGs) to shift the world onto a sustainable path. By referring to the SDGs as indivisible, the Agenda emphasises the interdependence of social and ecological concerns. LÄS MER

  3. 2. Turbulence-Assisted Planetary Growth : Hydrodynamical Simulations of Accretion Disks and Planet Formation

    Författare :Wladimir Lyra; Nikolai Piskunov; Thomas Henning; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; accretion; accretion disks; hydrodynamics; instabilities; methods: numerical; solar system: formation; planets and satellites: formation; magnetohydrodynamics MHD ; turbulence; diffusion; stars: planetary systems: formation; Astronomy and astrophysics; Astronomi och astrofysik;

    Sammanfattning : The current paradigm in planet formation theory is developed around a hierarquical growth of solid bodies, from interstellar dust grains to rocky planetary cores. A particularly difficult phase in the process is the growth from meter-size boulders to planetary embryos of the size of our Moon or Mars. LÄS MER

  4. 3. Astrophysical impacts on habitable planetary systems

    Författare :Giorgi Kokaia; Astronomi - Genomgår omorganisation; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Finding life on a planet other than the Earth would easily be one of the greatest discoveries of all time, particularly so if it is found outside our Solar System. To do so, we must understand the conditions required for life to emerge and develop. LÄS MER

  5. 4. Managing Complex Environmental Risks for Sustainable Development

    Författare :Mikael Karlsson; Karlstads universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Sustainable development; risk assessment; risk management; complexity; trust; scientific uncertainty; hazardous chemicals; genetically modified organisms; reflexive modernization; ecological modernization; environmental policy; polluter pays principle; pr; Miljö- och energisystem; Environmental and Energy Systems;

    Sammanfattning : The thesis is concerned with the problematic question on how to manage complex environmental risks in a way that promotes sustainable development. While there are some positive signs on progressive and successful environmental policy, environmental change resulting from human activities still causes severe problems and risks worldwide. LÄS MER

  7. 5. Formation and Early Evolution of Planetary Systems

    Författare :Daniel Carrera; Astronomi - Genomgår omorganisation; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; planet formation; planets and satellites: dynamical evolution and stability -- planets and satellites: gaseous planets -- planets and satellites: terrestrial planets; planets and satellites: terrestrial planets;

    Sammanfattning : Over the past 20 years we have discovered that exoplanets are common in the Galaxy, and are far more diverse than anyone expected. Half of all Sun-like stars are accompanied by at least one super-Earth (a planet with a size between Earth and Neptune), many planets have very high eccentricities indicative of a dynamical origin, and a small fraction of stars are accompanied by hot Jupiters, whose origin is poorly understood. LÄS MER